2028439 has 16 divisors (see below), whose sum is σ = 2483712. Its totient is φ = 1618848.

The previous prime is 2028431. The next prime is 2028443. The reversal of 2028439 is 9348202.

It is not a de Polignac number, because 2028439 - 2³ = 2028431 is a prime.

It is a super-2 number, since 2×2028439² = 8229129553442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6777 + ... + 7069.

It is an arithmetic number, because the mean of its divisors is an integer number (155232).

2^2028439 is an apocalyptic number.

2028439 is a deficient number, since it is larger than the sum of its proper divisors (455273).

2028439 is a wasteful number, since it uses less digits than its factorization.

2028439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 2028439 is about 1424.2327759183. The cubic root of 2028439 is about 126.5864781780.

The spelling of 2028439 in words is "two million, twenty-eight thousand, four hundred thirty-nine".